The inn that the girls were lodging at was the Laguna Hills Lodge in Laguna Hills, CA.
The movie theater that the girls were discussing in the car is the Orange Theater in Orange, CA which became "Son Light Christian Center" in December, 1975.
The iconic water fountain shown during the driving scenes is located in Plaza Park in downtown Orange, California.
The location of the buildings representing Logansport High School at nighttime at the end of the movie actually took place on the campus of Chapman University in Orange, CA.
The store Ridgefields Drug Pharmacy in the movie is actually called Watson's Drug & Fountain Soda which closed in 2022 and is now called Hectors on the Circle located in Orange, CA.